Pair phase transition and its evolution on even 64~68Ge isotopes

NUCLEAR, HEAVY ION AND ATOMIC PHYSICS

Pair phase transition and its evolution on even ^64~68Ge isotopes

TONG Hong，

SHI Zhu-Yi

Nuclear Science and Techniques

Vol.15, No.5

pp.261-264

Published in print 01 Oct 2004

CLC：O571.211

33100

By using a microscopic sdIBM-2+2q.p. approach which is the phenomenological core plus two-quasi-particle model and the experimental single-particle energies, the levels of the ground-band, β-band, γ-band, and partial two-quasi-particle states on ^64~68 Ge isotopes are successfully reproduced. Based on the phenomenological model and microscopic approach, it has been deduced that no s-boson in the nucleus is breaking up and aligning; and that when one d-boson does, the minimum aligned energy can be calculated. This paper explicitly indicates that, with the increase of neutron number, an evolution process of PPT objectes, i.e. from the two-quasi-proton states (on ⁶⁴ Ge nucleus) to the two-quasi-neutron states (on ⁶⁸ Ge nucleus) may take place in even Ge isotopes.

Pair phase transitionLow-energy spectraHigh-spin stateEven 64~68 Ge isotopes

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